[AG-TECH] AG SIGGRAPH Session Mon 9th Nov: Video Show+

[Martin Turner]

*** Apologies for Cross-posting ***

*** DOUBLE EVENT Day MONDAY 9th November 2009. 1pm and 2pm  GMT ***

*** PS Wine available - and there is now an extra special Stereoscopic 
NASA video show sequence  ***

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Graham Fyffe, "Cosine Lobe Based Relighting from Gradient Illumination 
Photographs"

Monday 9th November 2009, 1-2pm Room 1.10, Kilburn Building The 
University of Manchester

Abstract: We present an image-based method for relighting a scene by 
analytically fitting a cosine lobe to the reflectance function at each 
pixel, based on gradient illumination photographs. Realistic relighting 
results for many materials are obtained using a single per-pixel cosine 
lobe obtained from just two color photographs: one under uniform white 
illumination and the other under colored gradient illumination. For 
materials with wavelength-dependent scattering, a better fit can be 
obtained using independent cosine lobes for the red, green, and blue 
channels, obtained from three monochromatic gradient illumination 
conditions instead of the colored gradient condition. We explore two 
cosine lobe reflectance functions, both of which allow an analytic fit 
to the gradient conditions. One is non-zero over half the sphere of 
lighting directions, which works well for diffuse and specular 
materials, but fails for materials with broader scattering such as fur. 
The other is non-zero everywhere, which works well for broadly 
scattering materials and still produces visually plausible results for 
diffuse and specular materials. Additionally, we estimate scene geometry 
from the photometric normals to produce hard shadows cast by the 
geometry, while still reconstructing the input photographs exactly.

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Carlye Archibeque, 2009 SIGGRAPH Computer Animation Festival, Executive 
Producer "CAF (Computer Animation Festival) Screening"

Monday 9th November 2009, 2-3pm Room 1.10, Kilburn Building The 
University of Manchester

Abstract: Carlye Archibeque will be presenting some of the best SIGGRAPH 
animation video clips from the 2009 DVD collection. This covers a unique 
set of animation from professional houses to amateur enthusiasts all of 
whom have excelled in excellence. Wine will be available to help the event.


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Part of http://manchester.siggraph.org/

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Anyone wishing to view a discussion via Access Grid should note the 
following. Please check the Jabber room shortly before the start of the 
seminar to find if ScreenStreamer is to be used.

Virtual Venue: University of Manchester Room1:10

Jabber Room: university-of-manchester-(1.10) 
(sam.ag.manchester.ac.uk)@conference.mcs.anl.gov

ScreenStreamer: Preferably use ScreenStreamer software - go to 
http://www.memetic-vre.net/software/ScreenStreamer/ScreenStreamer.php 
and select room "University of Manchester (1.10)" from the AGSC section. 
Grab the screen feed (by clicking on it) from the screenstreamer window 
and resize it - more info can be found on 
http://www.memetic-vre.net/software/ScreenStreamer.

Alternatively, the screenshot (not animated) can be accessed at 
http://192.150.184.66:7890 (this IP might change for some sessions - 
please check Jabber).

PS the video show may not have full quality etc.